BRRD22 is a medium power amplifier of BHE’s audio broadcast solution. It can be operated as a single unit to amplify the whole VHF DAB frequency band. To handle fewer ensembles, a channel selective unit(s) (e.g. BRRD14) should preceed the unit. One amplifier can serve several channel modules. To simplify the RF cabling, the ampifier has three independent inputs. This unit can be combined with BHE rackmount TETRA repeaters fulfilling the various communications need of special places like tunnels or underground stations.